Recording torsion pendulum



Fi1ed Feb' 28, 1965 R w. MYERHOLTZ, JR

REcORDNG TORSION PENDULUM Sheetssheet 2 |NDICATOR EXCITATION SOURCE 

1. MATERIALS TESTING APPARATUS WHICH COMPRISES: A SUPPORTED AND FREELY ROTATABLE MOUNT-OF-INERTIA DISC; A ROTAABLE SHAFT MEMBER RIGIDLY ATTACHED TO SAID DISC TO ROTATE THEREWITH, THE PLANE OF SAID DISC AND THE PLANE OF ROTATION OF SAID DISC BEING SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID SHAFT MEMBER; TWO SPECIMEN CLAMP MEMBERS, SAID CLAMP MEMBERS BEING SPACED APART AND BEING ADAPTED TO RECEIVE A TEST SPECIMEN, THE FIRST OF SAID CLAMP MEMBERS BEING RIGIDLY CONNECTED TO SAID ROTATABLE SHAFT MEMBER TO ROTATE THEREWITH, THE SECOND SAID CLAMP MEMBERS BEING NON-ROTATABLE IN A PLANE PARALLEL TO THE PLANE OF ROTATION OF SAID DISC AND BEING MOVABLE FOR SHORT DISTANCES ALONG THE EXTENSION OF THE ROTATIONAL AXIS OF SAID DISC; AN ANGULAR POSITION TRANSDUCER CONNECTED TO SAID ROTATABLE SHAFT MEMBER TO CONVERT THE ROTARY MOTION OF SAID SHAFT POLARITY PROPORTIONAL TO THE DEGREE AND DIRECTION TUDE AND POLARITY PROPORTIONAL TO THE DEGREE AND DIRECTION OF ROTATION OF SAID SHAFT MEMBER; AND INDICATOR MEANS CONNECTED TO SAID TRANSDUCER TO RECEIVE SAID SIGNAL AND TO INDICATE THE DEGREE AND DIRECTION OF ROTATION OF SAID SHAFT MEMBER. 